Yuanping Zhu, Jing Xu, Yang Yang, Xin Yang, Ze-ping Hu
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引用次数: 6
摘要
软频率复用(Soft Frequency Reuse, SFR)被广泛用于处理严重的小区间干扰，特别是小区边缘用户的小区间干扰。本文提出了一种分析研究OFDM (Orthogonal Frequency Division Multiplexing)系统中采用SFR方案时上行小区间干扰统计的分析方法。首先推导了相邻干扰单元的ICI的概率密度函数(PDF)，然后用它来推导多个干扰单元的ICI的期望和方差。通过与蒙特卡罗仿真的比较，验证了所得结果。此外，还研究了系统参数与不同频段ICI统计量之间的关系。这些贡献将为系统优化提供重要的指导。
Inter-cell interference statistics of uplink OFDM systems with Soft Frequency Reuse
Soft Frequency Reuse (SFR) has been widely used to deal with the severe ICI (Inter-Cell Interference) especially for cell edge users. This paper presents an analytical method to investigate the statistics of inter-cell interference in uplink when SFR scheme is adopted in OFDM (Orthogonal Frequency Division Multiplexing) systems. PDF (Probability Density Function) of ICI from one adjacent interfering cell is derived and then used to deduce the expectation and variance of ICI from multiple interfering cells. The derived results are validated through comparison with Monte Carlo simulations. In addition, the relationships between system parameters and statistics of ICI in different frequency bands are investigated. These contributions will give inspect into important guidelines to system optimization.
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